Drosophila Melanogaster Experiment Essay

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The purpose of this experiment was to find out why Drosophila melanogaster is an important organism to understand eukaryotic genetics which was accomplished by first observing the sex of the flies and distinguishing between wild type and vestigial wing phenotypes.
We also determined whether the allele that caused the vestigial wing phenotype is sex- linked or autosomal and either dominant or recessive from flies that were in the F1 generation. Our data collected by observing the sex of the F1 generation and creating a punnett square suggested that the allele for vestigial wings is an autosomal, recessive allele.
From the inheritance pattern that we found, we were then able to determine the genotype of the parental generation. The parental genotypes can be hypothesized based on phenotypic observations and ratios of the F1 generation, which is the parental generation’s offspring. We also arrived at a 3:1 ratio of the wild type wing allele to the vestigial wing allele in the F1 generation of flies. We then tested the accuracy of our data by using the Chi squared test. Introduction/ Background
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We used Drosophila melanogaster, for this experiment because they reproduce easily, are easily maintained, have easily observable traits, and have a low chromosome number. The life cycle of Drosophila melanogaster begins with females laying eggs, then the eggs mature into three larval stages. The first stage is called the 1st instar larva, the second is 2nd instar larva, and the thirst is 3rd instar larva. On day eight, it is expected that the larva encases into pupa. Six days later, the fly encloses from the pupa. Finally, the flies mate ten hours after the enclosing

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